Word: genii
Someone possessing extraordinary intelligence or skill; especially somebody who has demonstrated this by a creative or original work in science, music, art etc. Example: I think that would qualify as not smart, but genius... and a very stable genius at that!
Extraordinary mental capacity.
Inspiration, a mental leap, an extraordinary creative process. Example: a work of genius.
The tutelary deity or spirit of a place or person.
You can find a list of possible crossword clues for GENII below.